I am new here and in OpenGL,I wanna implement a first-person camera in OpenGL, but I dont know how to use mouse movement to change the Camera goal,I found that lots of case move the cursor in the center of the screen every time ,I wanna ask is there any other implementation ?Please show me some examples .Thanks!

How to calculate the move: use some variable (sensitivity in my example) for rotation angle. F.eks set sensitivity to 5.0 - it means each time you move your mouse, global angle changes with 5 degrees or smth.